Cita APA (7a ed.)
Alexander, L. G. (1967). New Concept English. Practic and Progress. Longman Group UK.
Cita Chicago Style (17a ed.)
Alexander, Louis George. New Concept English. Practic and Progress. London: Longman Group UK, 1967.
Cita MLA (9a ed.)
Alexander, Louis George. New Concept English. Practic and Progress. Longman Group UK, 1967.
Precaución: Estas citas no son 100% exactas.